JP2007307803A - Graver - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve the shape of a guard so as to get the better operational convenience of a graver since the region facing to the cutting edge of the blade of the conventional graver is blocked with the tip part of a loop-like guard and consequently the region becomes hard to be seen by a user and the operational convenience of the graver becomes worse. <P>SOLUTION: A pair of guard arms 4 with an interval therebetween are provided in a gripping handle and, at the same time, a blade 5 is provided between both the guard arms 4 under the condition that a gap S is provided between tip parts 9a separated from each other by both the guard arms 4. The cutting edge 5a of the blade 5 is provided facing to the gap S inside the gap S. Both the guard arms 4 not only protect the fingers of the user and the cutting edge 5a but also the operational convenience of the graver can become better. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a carving sword having a guard for protecting a user's finger and blade edge.

Conventionally, the engraving sword according to Patent Document 1 described below includes a loop guard that surrounds the periphery of a blade attached to a grip handle.
Japanese Patent No. 3540719

In the above-mentioned patent document 1, since the region facing the blade edge of the blade body is closed by the tip of the loop guard, it becomes difficult for the user to see the region, and the usability of the engraving sword is deteriorated.
An object of the present invention is to improve the usability of the sword by improving the shape of the guard.

The present invention will be described with reference to the drawings of the following embodiments (the first embodiment shown in FIGS. 1 to 3 and the second embodiment shown in FIGS. 4 to 5).
In the engraving sword according to the invention of claim 1 (corresponding to the first and second embodiments), the grip handle 1 is provided with a pair of guard arms 4 spaced apart from each other, and the blade body 5 provided on the grip handle 1 is provided. Both guard arms 4 are arranged on both sides of the gap, and a gap S is provided between the distal end portions 9a separated from each other by the guard arms 4.

In the invention of claim 1, the user's finger and the blade edge 5 a are protected by the two guard arms 4, and the user can easily see the cutting surface R by the blade body 5 by the gap S between the two guard arms 4.
In the second aspect of the invention (corresponding to the first and second embodiments) based on the first aspect of the invention, a blade edge 5a provided at the tip of the blade body 5 is formed between the guard arms 4 and the gap S. It is provided on the inside facing the gap S or provided in this gap S. In the second aspect of the invention, since the cutting surface R is opened by the gap S in the region facing the blade edge 5a of the blade body 5, the user can easily see the region.

  In the invention of claim 3 (corresponding to the first and second embodiments) based on the invention of claim 1 or claim 2, each of the guard arms 4 has a flange portion 9 including the tip portion 9a, The flanges 9 are bent so as to approach each other. In the invention of claim 3, even when the guard arms 4 are arranged on both sides of the blade body 5, even if a sufficient space is provided between the guard arms 4, the gap S between the tip end portions 9 a is provided by the both flange portions 9. Since it can be suppressed to the necessary minimum, it is possible to stabilize both guard arms 4 when applied to the cutting surface R during use, and to further protect the user's fingers and blade edge 5a.

  In the invention of claim 4 (corresponding to the first embodiment) premised on the invention of claim 1 or claim 2 or claim 3, the guard arms 4 include support arm portions 6 extending from the grip handle 1 side. And a guide arm portion 7 extending from the support arm portion 6 and having the tip end portion 9a. The guide arm portions 7 are either one of both sides sandwiching an assumed plane P connecting the support arm portions 6 to each other. A guide surface 8 that is bent to the side and faces the other side is provided, and a blade edge 5 a provided at the tip of the blade body 5 is provided between the guide arm portions 7. In the invention of claim 4, the grip handle 1 can be separated from the shaving surface R when the guide surfaces 8 of both guide arm portions 7 are applied to the shaving surface R in use, and along the guide surface 8. The shaving operation can be stabilized by moving the handle 1.

  In the invention of claim 5 (corresponding to the first embodiment) based on the invention of claim 4, a part of the blade edge 5a protrudes from the mounting surface Q connecting the guide surfaces 8 of the both guide arm portions 7 together. ing. In the invention of claim 5, the cutting surface R can be smoothly cut by the cutting edge 5 a that protrudes moderately from the guide surface 8.

  In the sixth invention (corresponding to the second embodiment) based on the invention of claim 1 or claim 2 or claim 3, the guard arms 4 are assumed planes P connecting the guard arms 4 respectively. The blade edge 5 a provided at the tip of the blade body 5 is provided between the guard arms 4. In the sixth invention, when the pressing force against both guard arms 4 is changed when both guard arms 4 are applied to the cutting surface R, the bending degree of both guard arms 4 is changed. And the state of the two guard arms 4 and the cutting edge 5a with respect to the cutting surface R can be changed so as to be easy to use.

  In the invention of any one of claims 1 to 5 or a seventh invention (corresponding to the first and second embodiments) based on the sixth invention, the guard arms 4 are gripping handles. 1 is integrally formed. In the seventh invention, both guard arms 4 can be easily formed together with the handle 1.

  The present invention not only protects the user's finger and blade edge 5a with both guard arms 4, but also improves the usability of the engraving sword.

First, the engraving sword according to the first embodiment of the present invention will be described with reference to FIGS.
A gripping handle 1 shown in FIG. 1 is made of a main body 2 that is molded from a hard resin such as polypropylene resin and exposed to the outside of the gripping handle 1 and a soft resin such as an elastomer resin that is softer than the hard resin of the main body 2. And a surface portion 3 which is molded and exposed to the outside of the grip handle 1 outside the main body portion 2. As shown in FIGS. 2A and 2B, the pair of guard arms 4 are integrally formed with the main body 2 on the head side of the gripping handle 1 and are elongated along the extending direction of the gripping handle 1. On both sides of the width direction Y orthogonal to the direction X, the main body 2 extends at a distance from each other and has a bending strength that does not bend unexpectedly. A blade 5 is inserted into the main body 2 between the guard arms 4. Note that concave finger rests 3 a are formed adjacent to both guard arms 4 on both sides in the width direction Y on the surface portion 3 of the grip 1.

  Both the guard arms 4 include a support arm portion 6 extending along the longitudinal direction X and a guide arm portion 7 extending from the support arm portion 6. The both guide arm portions 7 have guide surfaces 8 that are bent upward and face the lower side of both sides of the vertical direction Z across the assumed surface P along the width direction Y connecting the support arm portions 6. is doing. Both guide arm portions 7 have flange portions 9 that are bent so as to approach each other in the width direction Y. Both the flanges 9 include front end portions 9a facing each other in the width direction Y. The two tip portions 9a are separated from each other, and a gap S is provided between the two tip portions 9a. The blade edge 5a formed at the tip of the blade body 5 is disposed between the guide arm portions 7 so as to face the gap S between the guide arm portions 7 in a plan view. The width direction dimension W5 is substantially equal to the dimension WS. When the width direction dimension WS and the width direction dimension W5 are compared, one may be set larger or smaller than the other. Incidentally, the width direction dimension W5 may be set to 2 to 15 mm, and the width direction dimension WS may be set to 3 to 15 mm or 0.5 to 1.5 times W5. Although not shown, the blade edge 5a may be disposed in the gap S. In the side view, a part of the blade edge 5a protrudes downward from the mounting surface Q that connects the guide surfaces 8 of the two guide arm portions 7. However, the entire blade edge 5a extends downward from the mounting surface Q. You may make it project to. For example, although it depends on the size of both guard arms 4, it is projected by about 0.1 to 10 mm.

  In FIG. 1, the total length A of the engraving sword is about 165 mm, and in FIG. 2A, the depth B between the guard arms 4 is about 30 mm. Further, in FIG. 2A, the maximum width direction dimension C between the guard arms 4 is the same as the maximum width direction dimension of the gripping handle 1 or larger than the maximum width direction dimension of the gripping handle 1. Further, in FIG. 2B, the dimension in the vertical direction Z of both guard arms 4 is gradually smaller toward the tip end 9a side.

  As shown in FIG. 3, in a state where the gripping handle 1 is tilted and held, the guide surfaces 8 of the guide arm portions 7 of both guard arms 4 are applied to the cutting surface R, and the guide surface 8 is moved along the cutting surface R. The cutting surface R is scraped off by the blade edge 5a while sliding. At the time of use, the user's finger and the blade edge 5a are protected by both guard arms 4. Since the cutting surface R is opened by the gap S in the region facing the blade edge 5a of the blade body 5, the user can perform the cutting work while looking at the region.

Next, the engraving sword according to the second embodiment of the present invention will be described with reference to FIGS. 4 to 5 with a focus on differences from the first embodiment.
As shown in FIGS. 4 and 5A, the entire guard arm 4 including the support arm portion 6 and the guide arm portion 7 is extended along the longitudinal direction X, and is formed of a soft resin. Therefore, it has the elasticity bent to the up-and-down both sides which sandwich the assumption surface P which ties between both the guard arms 4. Even when both guard arms 4 are formed of hard resin, it is possible to provide elasticity by forming notches in both guard arms 4 to facilitate bending. In plan view, the blade edge 5a of the blade body 5 is disposed between the guard arms 4 and facing the gap S inside the gap S, and has a width direction dimension substantially equal to the width direction Y dimension of the gap S. ing. When viewed from the side, the entire blade body 5 is hidden inside the guard arms 4, and the vertical dimension Z of the blade edge 5 a is the same as or smaller than the vertical dimension Z of the guide arm portions 7. However, a part of the blade edge 5a may slightly protrude from the inside between the guard arms 4 to the outside.

  First, as shown in FIG. 5A, the guide arm portions 7 of both guard arms 4 are applied to the cutting surface R in a state where the grip handle 1 is tilted and gripped. Next, as shown in FIG. 5B, when both guard arms 4 are pressed against the shaving surface R, both guard arms 4 are bent and bent by its elasticity, and the guide surfaces 8 of both guide arm portions 7 are shaved. Applied to R. Thereafter, the cutting surface R is scraped off by the cutting edge 5 a while sliding the guide surface 8 along the cutting surface R. At the time of use, the user's finger and the blade edge 5a are protected by both guard arms 4. Since the cutting surface R is opened by the gap S in the region facing the blade edge 5a of the blade body 5, the user can perform the cutting work while looking at the region. When the pressing force on both guard arms 4 is released, the state of FIG.

In addition to the two embodiments, the following configuration may be used.
* Both guard arms 4 are detachably attached to the handle 1.
* The tip portion 9a is formed in a spherical shape or a hemispherical shape by the flange portion 9 of both guide arm portions 7. Further, both the guard arms 4 including the support arm portion 6 and the guide arm portion 7 are formed linearly without the collar portion 9, and in this case, the tip end portions 9 a of the both guide arm portions 7 are spherical or hemispherical. To form.

* The material of the gripping handle 1 and both guard arms 4 may be other than resin, such as metal, wood, bamboo or paper.
* The material of the blade 5 may be carbon steel, carbon tool steel, or stainless steel, or a laminated material obtained by laminating and joining these steels.

* As the type of the blade body 5, a round sword or a square sword can be adopted.
* In the second embodiment, both guard arms 4 may be integrally formed with the surface portion 3.
* In the second embodiment, both the guard arms 4 may be a composite of a hard material and a soft material. For example, a soft material may be provided around a thin plate of hard material.

* Both the guard arms 4 may have different lengths in the longitudinal direction X from each other.
* The shape of both guard arms 4 may be asymmetric in the width direction Y.
* Although not shown in the figure, a support arm is arranged along the blade extending from the head of the gripping handle so as to extend from the head of the gripping handle, and this support arm is located near the blade edge of the blade. Both guard arms are provided in a bifurcated manner from the tip of the part, and a cutting edge is disposed between the guard arms.

It is a perspective view which shows the engraving sword concerning 1st Embodiment. (A) is the fragmentary top view which shows the head side of the engraving sword concerning 1st Embodiment, (b) is the fragmentary sectional view which looked at the head side of this engraving sword from the side surface side. It is a side view which shows the use condition of the engraving sword concerning 1st Embodiment. It is a perspective view which shows the engraving knife concerning 2nd Embodiment. (A) (b) is a side view which shows the use condition of the engraving sword concerning 2nd Embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Grip handle, 4 ... Guard arm, 5 ... Blade body, 5a ... Blade edge, 6 ... Support arm part, 7 ... Guide arm part, 8 ... Guide surface, 9 ... Gutter part, 9a ... Tip part, S ... Gap, P: Assumed surface, Q: Mounting surface.

Claims (5)

A pair of guard arms are provided on the grip handle with a space between them, and both guard arms are arranged on both sides of the blade provided on the grip handle, and a gap is provided between the tip portions separated from each other by the guard arms. A carving sword characterized by that. The engraving sword according to claim 1, wherein a blade edge provided at a tip portion of the blade body is provided facing the gap inside the gap between the guard arms, or provided in the gap. The engraving sword according to claim 1 or 2, wherein each of the guard arms has a collar including the tip, and the collar is bent so as to approach each other. The both guard arms include a support arm portion extending from the grip handle side and a guide arm portion extending from the support arm portion and having the tip portion, and the both guide arm portions connect the support arm portions. It has a guide surface that is bent to one side of both sides of the assumed surface and faces the other side, and the cutting edge provided at the tip of the blade body is provided between the two guide arm portions. The sword according to claim 1, claim 2, or claim 3. 5. The engraving sword according to claim 4, wherein a part of the blade edge protrudes from a mounting surface that connects the guide surfaces of the both guide arm portions.

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